JACK A4B-A/C Err-09: Check the Brake Resistor Circuit Safely
Exact model: JACK A4B-A/C
Safety: Disconnect mains before clearing thread or checking motor/solenoid connections.
A.
Start with the accessible checks
What this suggests: Err-09 on the JACK RA6 manual points to the braking resistor circuit, including a specifically illustrated WHITE resistor connector on the power board.
What to do
- Disconnect mains and allow stored energy to discharge; qualified service should inspect the white brake-resistor connector identified in the manual, reseat a loose connection and replace a heat-damaged resistor or cable only with the rated compatible part.
Still not fixed? Continue to the next check.
↑ Back to the repair pathsB.
If the problem remains after the first checks
What to do
- Do not energize an opened control box or bridge the resistor input; check the board for carbonized connectors before reuse.
Confirm the repair
Repeated start/stop braking works without Err-09, burning odor or overheating after proper repair.